CSS Build includes both @import statements and the widget's CSS

Description

First post to trac.

Using Ant to build 1.8pre, the aggregate file jquery-ui.css includes both the @import url(...) statements (starting on line 79) but, throughout the file, we see the CSS belonging to each of the widgets being imported.

Expected: no @import url(...) statements in the aggregate .js file.

Not sure if this double-inclusion is intended for the pre-release period, but I can't imagine why.